package chapter02;

public class test_ {
    public static void main(String[] args) {
                double d = 0.0 / 0.0;
                System.out.println(d);

                double a = 2.0;
                double b = 1.91;
                double c = 0.09;
                System.out.println(a - b == c);
                System.out.println(a - b);
                System.out.println(Math.abs(a - b - c) < 1E-6);

    }
}
